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function test117
%TEST117 performance tests for GrB_assign
% test C(:,:)<M> += A
% SuiteSparse:GraphBLAS, Timothy A. Davis, (c) 2017-2020, All Rights Reserved.
% http://suitesparse.com See GraphBLAS/Doc/License.txt for license.
fprintf ('test117 ----------------------------------- C(:,:)<M> += A\n') ;
[save save_chunk] = nthreads_get ;
chunk = 4096 ;
rng ('default') ;
n = 4000 ;
I.begin = 0 ;
I.inc = 1 ;
I.end = n-1 ;
ncores = feature ('numcores') ;
for dc = [1e-5 1e-4 1e-3 1e-2 1e-1 0.5]
C0 = sprand (n, n, dc) ;
for da = [1e-5 1e-4 1e-3 1e-2 1e-1 0.5]
A = sprand (n, n, da) ;
for dm = [1e-5 1e-4 1e-3 1e-2 1e-1 0.5]
M = spones (sprand (n, n, dm)) ;
for subset = 0:1
fprintf ('\n--------------------------------------\n') ;
fprintf ('dc: %g, da: %g, dm: %g ', dc, da, dm) ;
if (subset)
fprintf ('M is a subset of C\n') ;
M = spones (M.*C0) ;
end
fprintf ('\n') ;
fprintf ('nnz(C): %g million, nnz(M): %g million, ', ...
nnz (C0) / 1e6, nnz (M) / 1e6) ;
fprintf ('nnz(A): %g million\n', nnz (A) / 1e6) ;
% warmup
C1 = C0 + M.*A ;
tic
C1 = C0 + M.*A ;
tm = toc ;
for nthreads = [1 2 4 8 16 20 32 40 64]
if (nthreads > 2*ncores)
break ;
end
nthreads_set (nthreads, chunk) ;
if (nthreads > 1 & t1 < 0.003)
continue
end
% warmup:
C2 = GB_mex_assign (C0, M, 'plus', A, I, I) ;
C2 = GB_mex_assign (C0, M, 'plus', A, I, I) ;
tg = grbresults ;
assert (isequal (C1, C2.matrix)) ;
if (nthreads == 1)
t1 = tg ;
end
% ewise
C2 = GB_mex_Matrix_eWiseMult (C0, [ ], 'plus', 'times', M, A) ;
C2 = GB_mex_Matrix_eWiseMult (C0, [ ], 'plus', 'times', M, A) ;
tg3 = grbresults ;
assert (isequal (C1, C2.matrix)) ;
fprintf (...
'%3d : %8.4f GB: %8.4f %8.4f rel %8.2f %8.2f\n', ...
nthreads, tm, tg, tg3, tm / tg, tm/tg3) ;
end
end
end
end
end
nthreads_set (save, save_chunk) ;
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